Hi there, Ronald!
Thanks to your father for his service!
While your father is welcome to purchase you those tickets, he will be required to be with you on at least one occasion.
Per the official Web site:
"Eligible Service Members (or their spouses) who purchase Disney 4-Day Military Promotional Tickets for admission to the Walt Disney World Resort for themselves and their family members and friends will be required to activate those Tickets at Walt Disney World theme park ticket windows, no later than September 30, 2012, in order for those Tickets to be used.
Valid military identification will be required.
One (1) of the Disney 4-Day Military Promotional Tickets purchased on each occasion must be for use by the Eligible Service Member or spouse. This offer is for active or retired members of the U.S. military, including the National Guard, Reservists and the U.S. Coast Guard.
Each Disney Military Promotional Ticket must be used by the same person on any and all days. Disney Military Promotional Tickets may be used ONLY by the Eligible Service Members, spouses, other family members or friends for whom they are purchased.
In addition, a valid military ID may be required for admission."
Your father will need to be present to activate the ticket and show his military ID both at time of purchase and at time of activation.
What a wonderful gift -- enjoy!
See you later, celebrator,
-Deborah B.